// Copyright 2021 Datafuse Labs
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use crate::protobuf as pb;
use crate::protobuf::WatchResponse;
use crate::Change;

impl WatchResponse {
    pub fn new(change: &Change<Vec<u8>, String>) -> Option<Self> {
        let ev = pb::Event {
            key: change.ident.clone()?,
            prev: change.prev.clone().map(pb::SeqV::from),
            current: change.result.clone().map(pb::SeqV::from),
        };

        Some(WatchResponse { event: Some(ev) })
    }
}
